从文件创建的 PHP jpeg 图像质量低

Question

This code randomly generates an image from an array. It works fine, but the image is compressed heavily. Is there a way to keep the quality?

$img = array('1.jpg', '2.jpg', '3.jpg' ); // Adds images into an array
$i = rand(0, count($img)-1); // Generates a random number (max being the last elements index from the array)
$chosenimg = "$img[$i]"; // Sets the variable $chosenimg to equal to whatever the random image was
$image = imagecreatefromjpeg($chosenimg);
imagealphablending($image, false);
imagesavealpha($image, true);
header('Content-Type: image/jpeg');
imagejpeg($image);
imagedestroy($image);

Answer 1

Checking the official documentation :

bool imagejpeg ( resource $image [, mixed $to [, int $quality ]] )

so you have to change imagejpeg($image); with imagejpeg($image, null, 100); to get the best quality.